How effective is the EC stack?

I have both caffeine + ephedrine pills but I've never taken either one. Is it worth trying the stack for appetite suppression? Went way over on my diet the last two days, needa get back on track and make up for it now.

I took Primatene and caffeine for 1 1/2 weeks, and I lost 8 lbs. Went from 192 - 184. But since I have MEPS on the 15th of Janaury, I had to get off it before they take my urine test. It works, and if you follow the website about the EC Stack Dosing you'll be fine. Probably go back on it again once I finish MEPS lol.